I think that it means your injection location is out of computational domain. Sometimes, that message is seen if you set the location just at the boundary. For example, if you set the location at the 0.0 and the grid information says that the location is 1.e-10 because of trunction error, then 0.0 is out of computational domain. At first, try to move your injection point slightly into the comutational domain, such as 1.e-05 if your location is 0.0